Fixed #27472 -- Fixed GEOSGeometry('POINT EMPTY').transform crash.

django/contrib/gis/geos/geometry.py

@@ -532,10 +532,10 @@ class GEOSGeometry(GEOSBase, ListMixin):
             raise GEOSException("Calling transform() with no SRID set is not supported")
 
         # Creating an OGR Geometry, which is then transformed.
-        g = gdal.OGRGeometry(self.wkb, srid)
+        g = gdal.OGRGeometry(self._ogr_ptr(), srid)
         g.transform(ct)
         # Getting a new GEOS pointer
-        ptr = wkb_r().read(g.wkb)
+        ptr = g._geos_ptr()
         if clone:
             # User wants a cloned transformed geometry returned.
             return GEOSGeometry(ptr, srid=g.srid)

tests/gis_tests/geos_tests/test_geos.py

@@ -1359,6 +1359,10 @@ class GEOSTest(SimpleTestCase, TestDataMixin):
         p = Point(srid=4326)
         self.assertEqual(p.ogr.ewkt, p.ewkt)
 
+        self.assertEqual(p.transform(2774, clone=True), Point(srid=2774))
+        p.transform(2774)
+        self.assertEqual(p, Point(srid=2774))
+
     @ignore_warnings(category=RemovedInDjango20Warning)
     def test_deprecated_srid_getters_setters(self):
         p = Point(1, 2, srid=123)